EPA is issuing a notice of proposed action under the Clean Water Act to issue a National Pollutant Discharge Elimination System (NPDES) permit (No. NN0021610) to Cameron Trading Post for the wastewater treatment facility located on private land in Cameron (Township 29N, Range 9E, Section 22), Coconino County, Arizona.
The Cameron Trading Post facility treatment plant serves a full-time population equivalent of 660 and receives only domestic sewage with a design flow of 0.07 million gallons per day. The facility provides secondary treatment which consists of dual train activated sludge aeration tanks, clarifiers, sludge holding tanks, sludge drying beds, drying beds for turning semi-solid to solid sludge, and ultraviolet light disinfection. All or a portion of the effluent undergoes sand filtration prior to discharge. The proposed permit will regulate the discharge of treated effluent from the lagoon facility to the Little Colorado River within the Navajo Nation.